It's well known that Carstensz is difficult to climb independently. If you ask the commercial outfitters they'll give you examples of how it went wrong for those who try. I do believe them, but obviously several teams have tried to climb Carstensz unguided.
My question is if there is anyone who has done a successful climb of Carstensz independently? If so, I would very much like to get in contact with you.
Thanks a lot!